Update TiDB Cloud dashboards for Dedicated, Premium, and Essential - #3083

• All applicable files are owned properly
  _{Digest: 74d6a8b}

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• Needs approval from Team: ecosystems-review

• Needs approval from Reviewer: SabaPing

• Needs approval from Reviewer: xuyifan02@pingcap.com

  _{Questions about this check? Reach out in #dx-source-code-management on Slack.
  Digest: 757e1e5}

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